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[German : ur-, original (from Middle High German, out of, from Old High German; see ud- in Indo-European roots) + Sprache, language, speech (from Middle High German sprāche, from Old High German sprāhha).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Linguistics) any hypothetical extinct and unrecorded language reconstructed from groups of related recorded languages. For example, Germanic is an Ursprache reconstructed by comparison of English, Dutch, German, the Scandinavian languages, and Gothic; Indo-European is an Ursprache reconstructed by comparison of the Germanic group, Latin, Sanskrit, etc
[from ur- primeval, original + Sprache language]
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